When running JS local Rhino debugging in Indigo M7 (20110505), I can't seem to find a way to give Rhino access to Java classes, either in the same project or in projects I have open in the same workspace. For example:

starting
js: uncaught JavaScript runtime exception: TypeError: [JavaPackage com.troux.test.JSTestClass] is not a function, it is object.

The fact that Rhino thinks com.troux.test.JSTestClass is a "JavaPackage" is a reflection of the default import behavior where it assumes that anything in the com.* namespace it doesn't recognize is a package until it finds otherwise. Playing around in the Rhino console, with the classpath set correctly, I can run the same script, in which case com.troux.test.JSTestClass is identified as being a "JavaClass", not "JavaPackage", and I am able to invoke the constructor.